Polishing machine



June 17, 1930. F. FLEXON ET AL POLISHING MACHINE Filed Opt. 28, 1927 4 Sheets-Sheet 2 (Ittomq June 17, 1930. F. FLEXON ET AL POLISHING MACHINE Filed 061;. 28, 1927 4 Sheets-Sheet 2 l l I I A U 1 M w w W 5 ill 4 11: E m F0 2 0 e e W w Wm. w w v 4 a if? z I a My W a a 7 a June 17, 1930. F. FLEXON El AL 1,764,161

I POLISHING MACHINE Filed Oct. 28, 1927 4 Sheets-Sheet 5 June 17, 1930. F. FLEXON ET AL 1,7 4,

POLISHING MACHINE Patented June 17, 1930 .UNITED STATES PATENT OFFICE FLOYD FLEXON, OF FAIRMONT, WEST VIRGINIA, AND CLARENCE CHEW, OF PITMAN, NEW JERSEY, ASSIGNORS TO OWENS-ILLINOIS GLASS COMPANY, OF TOLEDO, OHIO,

A CORPORATION OF OHIO POLISHING MACHINE Application filed October 28, 1927.

The present invention relates to improve;- ments in polishing machines and more particularly to a machine adapted for use in polishing the threads of neck mold thimbles of glassware forming machines.

According to common practice, the threads of neck mold thimbles are polished by arranging the thimble sect-ions, one at a time, in a stationary holder, the operator then fixing a piece of emery cloth or the like abrasive material to a suitable instrument and manually polishing the grooves by giving the instrumenta reciprocating movement lengthwise of the threads. This practice is objectionable in that considerable time is expended in effecting satisfactory polishing, and at best there is more or less lack of uniformity in the surfaces thus polished.

An object of the present invention is to provide a machine adapted to hold the two sections of a neck mold thimble in assembled relation to each other and automatically cause such movement of the thimble that a polishing tool may be held stationary and .engaged with the threads to effectively and completely polish the surfaces of such threads. To this end, the invention includes a chuck or the like to hold neck mold thimbles, and means to oscillate and simultaneously reciprocate the chuck. Thus, the operator is required to merely hold the abrasive carrying tool stationary at the proper point, the chuck movement being substituted for operation of the tool as heretofore practiced.

Another object of the present invention is to provide means whereby the extent of oscillation and reciprocation of the chuck may be varied as required by the pitch and length of the threads in the neck mold thimble.

Other objects will be apparent hereinafter.

In the accompanying drawings Fig. l is a perspective view of the complete machine.

Fig. 2 is a vertical longitudinal sectional view thereof.

Fig. 8 is a sectional view taken substantially along the line IIIIII of Fig. 2.

the rheostat 20,

Serial No. 229,420.

means to reciprocate the thimble holding chuck, and means to compensate for wear in the threads of the chuck reciprocating device.

Fig. 9 is a front elevation of the chuck with a neck mold thimble therein.

Fig. 10 is a view similar to Fig.9 with the thimble removed therefrom.

Fig. 11 is a sectional View taken along the line XI-XI of Fig. 6.

The machine in the embodiment illus trated comprises an inverted U-shaped frame 15 formed with outwardly flared attaching flanges 16 to receive screws 17 which secure the frame to a suitable support. A lateral extension 18 on one leg of the frame serves as a support for a motor 19 which drives the mechanism hereinafter described. A rheostat 20 on the frame 15 is operable to regulate the motor speed. An upward extension 21 on the frame 15 at the end opposite supports the neck mold thi-mble holding chuck 22 and the drive shaft 23 which oscillates and simultaneouslv reciprocates sa'd chuck. A pair of horizo1i tally spaced bearings 24 arranged upon the upward extension 21 of the frame 15 (Figs. 1 and 2) supports the shaft 23.

' Arranged between these bearings 24 is a shaft reciprocating device comprising a pair of spaced collars 25 formed with aligned internally screw threaded shaft openings which-engage screw threads 26 formed on the shaft 28. These internally threaded collars 25 are formed with base flanges 27 having portions slidably fitted in wavs 28 formed in the upper side of the extension 21 These ways (Fig. 2) extend'parallel with the shaft axis and guide the two collars 25 when they are moved relative to each other to compensate for wearon the threads.

Slotlike openings 29 8) are formed in the base flanges 27 to receive securing bolts 30 which are threaded into openings in the extension 21.

The thimble holding chuck 22 is removably attached by screws 32 or the like fasteners to a head 33, which, in turn, is bolted to a two part collar 34 suitably mounted upon the outer end of the shaft 23. This two part collar 34 is preferably formed with an inwardly extending flange 35 (Fig. 2) which snugly seats in an annular way 36 formed in the shaft 23. Thus, when the two halves of the collar 34 are assembled and bolted to the head 33, an exceptionally subthreads being polished. Accordingly, a pinion 39 is fixed to the inner end of the shaft 23 and runs in mesh with a rack bar 10 mounted in a vertical guide ll rising from the frame extension 21. This rack bar 10 extends downwardly through an opening 42 in the upper side of said extension '21 and is connected to a 'rodet3. The lower end of this rod as extends through and is suitably connected to a slide 44 mounted for vertical reciprocation in guides 45 which are mounted upon the frame 15. This slide 14 (Figs.

and 7) is formed with a transverse slideway to in which a slide 47 (Fig. is mounted for reciprocation. \Vear of the slide l4 and guides 45 (Fig. 5) is compensated for by mounting one of the guides upon the frame 15 for adjustment toward and from the slide. Screws 18 (Figs. 3 and control adjustment of the guide. Screws 4:9 or the like are employed to hold the guide -il5 ii any adjusted position.

' The SlitG 47 (Figs. 2 and 4) is formed with a central transverse opening 50 which receives a wrist pin 51 formed on a block 52 adjustably mounted in an under-cut way 53. This way 53 is formed in an enlarged rib-like projection extending diametrically of a gear 5i which runs in mesh with a pinion 55 mounted on the motor shaft 56. An adjusting screw 57 (Figs. 2 and 1) extends longitudinally and centrally of the way 53 and is jou'rnalled at its ends in bearing plates 58. By rotating this adjusting screw 57, the spacing of the block 52 (Figs. 2 and i) from the axis of the shaft 59 on which the -gear 54 is mounted, is changed, with the result that the stroke of the rack bar 40 is proportionately varied. Thus, the degree of oscillation of the shaft and chuck is conon one end of a shaft 59 journalled in spaced bearings 60 on the frame 15. Spacing of these bearings as shown prevents slapping of the shaft and materially contributes to smooth performance of the mech anism in general.

In operation, the two halves of the neck mold thimble 38 are assembled and placed in the chuck 22 and held therein tightening of the set screw 37 or a similar fastening device. The pitch and length of the threads in the neck mold thimble 38 determines the position of the block 52 (Figs. 2 and 4) relative to the axis of the gear This adjustment having been made, the motor 19 is started, causing reciprocation of the rack bar 40 with consequent oscillation of the shaft 23. The threaded connection between the shaft 23 and the non-rotative collars 25, together with oscillation of the shaft, gives the chuck and thimble therein a combined reciprocating and oscillative movement. Thus, in polishing the grooves in the thimble, the operator merely holds a tool 61 in a stationary position so that the end of this tool projects into and firmly holds a piece of emery clothor the like abrasive material in the threads to be polished. Oscillation and reciprocation of the chuck takes care of the movement necessary 'to effect I complete and uniform polishing of the threads and eliminates the necessity of the operator moving the tool back and forth as has been the practice heretofore.

Modifications may be resorted to within the spirit and scope of the appended claims.-

What we claim is:

1. In a polishing machine, the combination of a chuckto hold an article to be polished, means to oscillate the chuck, means to reciprocate the chuck axially in timed relation to oscillation thereof, and an adjustable device included in the chuck oscillating and reciprocating means to vary the degree of oscillation and reciprocation of the chuck simultaneously.

2. In a polishing machine, the combination of a chuck to hold an article to be polished, a shaft mounting said chuck, means including rack-and pinion mechanism to oscillate the shaft and chuck, non-rotative devices threaded on the shaft'to cause reciprocation thereof during oscillation of the shaft, and an adjustable device included in the chuck oscillating means to vary the degree of oscillation and reciprocation of the chuck simultaneously.

3. In a polishing machine, the combination of a chuck to hold an article to be polished, a shaft mounting said chuck, rack 3 and pinion mechanism to oscillate the shaft and chuck, a pair of collars threaded 011 the shaft, a guideway extending parallel with the axis of said shaft, flange portions carried by the collars and projecting into said guideway to arevent rotation of the collars with the sha t, and means to hold the collars at any adjusted point in said guideway.

4. In a polishing machine, the combination of a holder for an article having threads to be polished, means to oscillate the holder a distance corresponding to the length of the threads, and means to reciprocate the holder axially a distance corresponding to that of the threaded surface of the article in timed relation to oscillation thereof.

5. In a polishing machine, the combination of a holder for an article having threads to be polished, means to oscillate the holder at distance corresponding to the length of the threads, means to reciprocate the holder axially a distancecorresponding to that of the threaded surface of the article in timed relation to oscillation thereof, and means to change the degree of movement of the article holder.

6. In a polishing machine, the combination of an article holder, a shaft mounting said holder, rack and pinion mechanism to oscillate said shaft and holder, a continuously rotating drive member, pitman connec tion between said member and the rack and pinion mechanism to operate the latter, means dependent upon oscillation of the shaft to axially reciprocate the shaft and article holder in timed relation to oscillation thereof, and means to adjust the pitman connection to change the degree of movement of the rack and pinion mechanism and thereby simultaneously change the degree of reciprocation and oscillation of the shaft.

7. In a polishing machine the combination of a chuck adapted to hold an article to be polished, a horizontal shaft carrying said chuck at one end, a pinion at the other end of the shaft, a rack bar running in mesh with said pinion, means to reciprocate the rack bar to thereby oscillate the shaft and chuck, means connected to the shaft and operable due to oscillation of the latter to reciprocate said chuck and shaft axially, and a single adjusting device operable to change the degree of reciprocation and oscillation of the chuck simultaneously.

8. In a polishing machine, a chuck adapted to hold an article to be polished, a horizontal shaft carrying said chuck at one end, rack and pinion mechanism arranged to oscillate said shaft, means to reciprocate said shaft and chuck, means to reciprocate said rack including a continuously rotating gear, a slideway extending diametrically across one face of the gears, a slide block in said slideway, means to adjust said slide block radially relative to the axis of rotation of the gear, and means connecting said block and rack whereby rotation of the gear reciprocates said rack.

9. In a polishing machine, a chuck adapted to hold an article to be polished, a horizontal shaft carrying said chuck at one end, rack and pinion mechanism arranged to oscillate said shaft, means to reciprocate said shaft and chuck, means to reciprocate said rack including a continuously rotating gear, a slideway extending diametrically across one face of the gears, a slide block in said slideway, means to adjust said slide block radially relative to the axis of rotation of the gear, means connecting said block and rack whereby rotation of the gear reciprocates said rack, said connecting means including a slideway fixed to and extending at right angles to the length of the rack, a slide in the slideway, and a wrist pin providing connection between said slideway and block.

In witness whereof I have hereunto aiiixed my7signature, this 29th day of September, 192

FLOYD FLEXON.

In witness whereof I have hereunto aflixed my signature, this 22nd day of October,

CLARENCE CHEW,

lift 

